Based on the example presented here...maybe it's a "consensus of one" and some photographers are simply more skilled at using the tools available as the statement above is obviously false. Not "required higher shutter"...we now see the proof in that

That's why I suggested him to fire 20 shots each between D4 and D800 and to see which camera has better average per-pixel sharpness. It's better to turn off VR. A single lucky shot with the help of excellent Nikon VR doesn't overturn the consensus of photography rule. No mention that photo is not really tack sharp.

You seem to be stuck well in the past, in many ways. I'm surprised how often you deny facts when presented in the form of picture examples. Unfortunate. At least you did learn a few things this time...that's improvement. Have a good day regardless.

But seriously is that a simple fact and consensus in general that,

Higher pixel density either from crop factor or from amount of pixels would require higher shutter in order to achieve the same level of per-pixel sharpness without help from other factors such as tripod or VR/IS as from a low density camera?

I am just disputing this simple issue, not denying D800 has higher resolution. Why you just cannot grasp on this.

What you gloss over is the fact that in many everyday situations, the technique and shutterspeeds you would be using to get the right exposure (espeically outdoors with fast glass) are good enough to make that point moot. So you seem to be the one who is not grasping - rather, you speak in absolutes on this topic, when you really should not!

However, at least now we know that you will never buy a higher resolution Canon DSLR as this issue is insurmoutable for you - you'll always get better results with your 5D3 as it will provide, at least to your eyes, better per-pixel sharpness. Good Luck.